Abrasive stone



FIG. 1 is a right side elevational view of an abrasive stone, showing mynew design, wherein the left side elevational view is a mirror imagethereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is an end elevational view thereof, wherein the opposite end viewis identical.

The ornamental design for an abrasive stone, as shown and described.